hatfield



(No Mode-1.) ,I 2 SheetS--She'et 1. 8. W. HATPIBLD.

OIL PRESS BOX.

No. 876,488. Patented Jau. 17, 1888.

WTNESSES:

.4 TT ORNE YS ERS, PhulaLithngmpner. waihingmn. D. c.

Y(No Moden.) 2 sheetssheen 2.

G. W. HATFIBLD.

OIL PRESS BOX..

No. 878,488. Panama Jan. 17, 1888.

' FIG/ WTNESSES: N/ENTOR ,v A: A 7818 l fwn/*gam UNITED STATES PATENTOFFICE.

GEORGE w. HATEIELD, OE TExARKANA, ARxANSAs, ASSIGNOR TO WALTER T.FORBES, OE ATLANTA, GEORGIA.

OIL-PRESS Box.

SPECIFICATION forming part of Letters Patent No. 376,438I dated January17, 1888.

Application led August 29, 1&87. Serial No. 248,131.

To all whom' it may concern.-

Be it known that I, GEORGE W. HATFIELD, ofTexarkana, in thecountyofMiller andState of Arkansas, have invented ya new and usefulImprovement in Oil-Press Boxes, of which thev following isaspecitication, reference being had to the accompanying drawings.

The object of my invention is to give greater efficiency to the press toenable it to resist with less liability of breakage the Severe pressnreto which it is exposed, to prevent waste of the oil, to guard againstlateral escape of either meal or oil, and to accomplish the largestamount of work within a given space.

My present inveption is an improvement on that for which Patent No. 272, 134 was granted IneFebruary 13, 1883, and retains the general plan oftelescopic boxes therein exhibited.

Figure lis a cross-section through two boxes in the series, the upperbox being shown in closed position and the lower open. Fig. 2 is alongitudinal section taken through the mealpan,grating or platen, anddivision-plate. Fig. 3 is a top View of the grating or platen. Fig. 4 isa side elevation of a press consisting of a series of my boxes, themiddle portion being omitted.

These presses are subjected to a high degree of pressure, usually aboutfour thousand pounds to the square inch, and sometimes exceeding this.It is desirable to make the divisionplates of steel or wroughtiron, ascast-iron plates are liable to breakage. The side walls must beconnected to these division -plates in such a manner as to resist thegreat lateral pressure to which they are subjected and to prevent theescape of the'meal or oil at the jointl formed between them. It is alsoimportant to provide for the ready escape of the oil from the mealpaninto the channels which conduct it to proper receivers,V so as toprevent any reabsorption of it into the meal through capillaryattraction. All these objects are effectually accomplished by myinvention, while I also obtain great economy in space.

A represents the division-plate, preferably made of steel orwrought-iron; E, a grated platen, which may be made of cast or wroughtiron or any other suitable material.

D is the meal-pan,which I form, preferably,

(No model.)

of either brass or malleable iron, cast or milled out to formcorrugations on its upper surface. In the interstices between thesecorrugations are longitudinal slots,which may be formed by milling,through which the oil escapes into the channels between the 4grating ofthe platen. These slots are widened at the bottom, thus securing a readydischarge of the oil without reabsorption.

B represents the side walls of my box, made preferably ofbrass,wrought-iron,or malleable iron, having on their upper face alip ortongue, m, which enters the corresponding recess, n, in the bottom ofthe division-plate, to which plate it is secured by bolts or rivets, asshown.

`The inner face of these side walls is coved out to form a projectinglip, p. Thelip m, taking into the recess n, serves at once to brace theside walls against the lateral pressure to which they are subjected and,to form a snug joint by which the escape of oil or meal between thedivision -plate and side walls is prevented. The projecting lip p,receiving the upward pressure of the meal beneath it, vserves also tolock the side wall and divisionplate together at this point andcounteract the tendency of the lateral pressure to force them apart,thus aiding in preventing either oil ory meal working into the jointbetween the side walls and division plate, while it also gives thedesired compression to the edges' of the cake. The lip m and recess nmay be formed either in the front or rear of the rivet or bolt whichsecures the side wall to the division-plate. rllhe position of thislipand recess may also be reversed-that is, the lip may be formed in thedivision-plate and the recess in the top of the wall B; but I prefer toform the lip on t-he top of the wall and the recess in the plate. Theseside walls may be strengthened by ribs r between the rivet-holes, asindicated partly by dotted lines in Fig. 1.

F represents ribs, which may be made of rolled angle-iron, extendingaround both sides and one end. of the division-plates and serving tocontine the oil, which is thus caused to iiow off over the open end ofthis plate and thence into suitable receptacles.

I claim as my invention-- 1. In combination with the division-plate ofroo an oiipress box, the lateral wail having a lip on its upper facefitting into o corresponding recess in the divisioirpate to which it isattached, for the purpose described.

2. In combination with the division-plate of au oil-press box, the sideWall united thereto by a tongue-and-groove connection and having aninwardly-projecting lip, for the purpose described.

3. In combination with the divisionpiate of im oil-press box, thelateral Wall secured to the undersurfnce thereof and having an inwardlyprojecting lip, whereby the upward pressure of the meal tends to tightenthe joint between the division-plate and side wall, as and for thepurpose described.

4. The combination, in an oil'press box, of the division-plate, the sideWall united thereto by a tongue-and-groove connection and havinginwztrdlyprojecting lip bearing against the diVision-p1nte, the grated.platen, and the corrugated puns with slots therein, for the purposedescribed.

GEO. W. HATFIELD.

Witnesses:

WALTER T. FORBES, AUGUST F. HERBsLET.

